Ademco AMC21
Ademco AMC21 CRT RGB mod
The Ademco AMC21 is a 21" color CRT CCTV monitor designed for professional surveillance, featuring multiple language OSD menus and automatic PAL/NTSC detection. It supports composite and s-video inputs, and is noted for its durable construction and potential for RGB modification.
View full CRT details and more mod examples →
Contributors
Thank you to everyone who contributed to this guide:
- Dan Lavoie — showcase author
CRT safety
Caution
You can die doing this! So read carefully! CRT TV is not a toy. Do not open a CRT TV. If you don't have any prior knowledge about handling high voltage devices, this guide is not for you. CRT TV contains high enough voltage (20,000+ V) and current to be deadly, even when it is turned off.
Plan of attack
Manuals and Datasheets
Specs
- Jungle Chip: Micronas VDP3130Y
- Screen Size: 21"
RGB mux diagram
Prepare the mux diagram. If you are building your own circuit, this diagram should help.
This mod uses the RGB mux board. This is optional, but will make your mod easier and stable. You can also create the circuit presented in the schematics above without the board. Please also checkout the mux calculator to play with your own values.
| On Ademco CRT Chassis | AMC21 |
|---|---|
| CRT RGB inline resistor | 1kΩ |
| CRT RGB ground resistors removed | 120Ω |
| 0.1μF caps replaced | No |
| Add diodes on chassis RGB lines? | No |
| Add blanking diode on chassis | Yes |
| RGB mux board | AMC21 |
|---|---|
| Mux board RGB termination (R1, R2, R3) | 75Ω |
| Mux board RGB inline resistors (R4, R5, R6) | 120Ω |
| Mux board Audio LR (R7, R8) | 1kΩ |
| Mux board blanking diode (R9) | 1N4148 |
| Mux board blanking ground resistor (R10) | open |
| Mux board blanking resistor (R11) | 120Ω |
Compatible mux boards:
Performing the mod
RGB mod for this set is not yet confirmed. Follow these instructions at your own risk.
You will attach your sync to S-Video luma Y (Line B) and Audio to (Audio B) in. Ground closer to the video
Remove resistor and inject R, G, B
Pictures
Photos by Dan Lavoie
Ademco AMC21 RGB mod showcase
Reference Photos
